Furnace wall construction



May 23, 1944.

w. H. BOYD FURNACE WALL CONSTRUCTION Filed Nov. 13, 1941 2 Sheets-Sheet1 May 23, 1944 w. H. BOYD FURNACE WALL CCNSTRUCTION Filed Nov. 15, 1941vi?, Sheets-Sheet 2 WTA/5% Patented May 23, 1944 FURNACE WALLCONSTRUCTION William H. Boyd, Drexel Hill, Pa., assigner to GeneralRefractores Company, Philadelphia, Pa., a corporation of PennsylvaniaApplication November 13, 1941, Serial No. 418,868

(Cl. l2-101) `6 Claims.

The object of the invention broadly is to provide improvements infurnace construction, and more especially in the structure and supportof what is generally known as a unit supported furnace wall.

Another object is to provide in such a wall the combination ofvertically spaced angle members, a novel form of detachable hangeradjustably carried by one of said members and comprising an upwardlyextending lug and an outwardly and diagonally upwardly extendingterminal portion, courses of insulating fire brick having recesses intowhich the terminal portions of said hangers extend, and provided withsloping upper wall surfaces which rest upon said terminal portions, andblocks or slabs of heatinsulating material, which at their lower limitsrest upon the hangers and are xedly bound at their lower limits betweenthe said brick and said lug, while at their upper limits said block orslabs are bound between said wall and the vertical outer surface of asecond or upper angle member.

A further object is to provide for such a construction an improved metalhanger, which basically comprises a transversely sloping, 1ongitudinallyextending rail, one or more integral arms extending initially in theplane of said rail and thence horizontally, each such arm being providedwith an upwardly extending lug, and upon its free end terminating in adownwardly and reversely directed hook portion, adapted to engage theunder surface of a horizontal flange forming a part of a structuralangle member, said hanger arm or arms being preferably though notnecessarily provided with depending lugs, which normally rest directlyupon the upper surface of the angle flange engaged by said hook portion.

Still another object is to provide the combination of a metal framework,comprising vertically spaced, horizontally extending angle members, incombination with hangers detachably carried by said members, a unitsupported wall of insulating fire brick supported by the free outerportions of said hangers, blocks or slabs of lightweightheat-insulatingmaterial of even very much lower thermal conductivity than said firebrick also supported by said hangers between said wall and said anglemembers. and if desired a protective element in sheet form covering theexposed surface of said insulating material.

And a still further object is to provide the combination of a supportingmember, a hanger carried thereby having an outwardly and downwardlysloping upper surface, a re brick having a recess provided with a.surface resting upon the sloping surface of said hanger, and blocks orslabs of heat-insulating material bound in position by and operating toprevent angular or lateral shifting of said brick or said material, assaid brick is free to gravitate upon said hanger and press saidinsulating material againstl said supporting member.

In the following description reference will be made to the accompanyingdrawings forming part hereof and in which,

Figure 1 is an elevational view from the outside of the furnace of awall construction embodying features of the invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on the line 3 3 of Figure 1.

Figure 4 is a perspective view illustrating features of the presentinvention and drawn to an enlarged scale.

Figure 5 is an enlarged view of features shown in Figure 2; and

Figure 6 is a view similar to Figure 5 illustrating a modication.

Referring to the drawings, the service lining is of insulating firebrick I and 2, which may be described as a ceramic material having lowthermal conductivity and low thermal capacity in combination with heatinsulating blocks or slabs 3 which comprise a material of very muchlower thermal conductivity than said fire brick, examples of suchinsulating material being known as mineral wool, magnesia block, andother types known as back-up insulation.

The insulating fire brick l are disposed with their faces ush and areknown as supported wall brick, while one or more ller courses of brick 2of the same material, are laid flat-wise with their faces iiush witheach other and with the faces of the first-mentioned brick upon whichthey are laid. A row of directly supported brick and the superimposedcourse or courses of ller brick are designated a unit or belt, whileseveral such units vertically arranged comprise a fire Wall. Someclearance space is provided between the units or belts to accommodateexpension and contraction and is indicated at a in Fig. 2 of thedrawings. 'I'he composite wall is backed up by blocks or slabs 3 ofinsulating material, which may be coated upon their outer and exposedsurfaces with a finishing cement,

weather proofing material. or the like, or the blocks may be protectedby sheets of steel plate, asbestos lumber or like material indicated atc, in Fig. 5, and which merely afford protection and in no waycontribute to the support of the bricks or other part of the structure.

Around the outside of the furnace are disposed in spaced relationcolumns 4 which may be either angle irons, I-beams, channels, or otherform of steel members. On the inside face of these columns there issuitably secured a series of horizontally disposed channel or anglemembers 5. For this purpose spacers or spacer castings 6 are interposedbetween the inner faces of the columns and the webs of the angle members5, and these are secured in place by bolts 1. The purpose of spacers 6is to ailord clearance between the horizontal flange or flanges 8 of therespective angle member and the adjacent face of the column for apurpose to be presently described.

The so-called hangers or brick-supporting members comprise transverselyinclined rails I0, having spaced, laterally extending, integral arms II,which merge into normally horizontally eX- tending sections. providedupon their opposite ends with depending, reversely curved` hook portionsI2, which engage the under surface of the upper ilange of the anglemember 5. The arms I-I are also provided, midway of their lengths. withupwardly and downwardly extending lugs I3 and I4. 'I'he downwardlyextending lugs Id rest upon the top of the upper flange of the anglemembers 5, and the purpose of the lugs I3 will be hereinafter described.The inclined rail I0 extends into inclined notches I5 provided in theinsulating bricks i and in that way said rows of bricks I are supportedand by gravity tend to settle towards the adjacent vertical surface ofthe said angle member 5. The inclination of the inclined rails lil andof the notches I5, may be twenty-two degrees from the horizontal, moreor less, It may be remarked that the supported bricks are slidablesidewise in respect to the rails Il), and the hangers as a whole areslidable longitudinally as weil as detachable. in respect to the channelmembers 5, which facilitates their proper positioning during erectionand repair. The blocks 3 rest upon the horizontal portions of the hangerarms Il, and at their lower limits are positioned between the supportedbrick wall on one side and on the other side by the lugs I3 of a hangercarried by a lower angle member. while the upper limits of said blocksare positioned between said wall and the vertical surface of a secondand higher angle member.

rl'he construction of the modification illustrated in Figure 6 is asabove described except that the member 5a is shown as of an anglesection instead of a channel section.

In both forms of the device. shown in Figs. 5 and 6. it will be notedthat when the horizontal thickness of the blocks or slabs 3 issubstantially uniform at their marginal portions. the distance from theinner surface of the hooked portion I2 of the hanger to the opposite face of the upper lug I3, should be substantially equal to that of thetransverse Width of tbe supporting flange of the angle or channel towhich the hanger is attached. Otherwise. the brick I in gravitating uponthe rail I 0 will bind more firmly one of the adjacent slabs 3, whileholding the other slab relatively loosely in place.

Having thus described my invention, what l claim and desire to protectby Letters Patent of the United States is:

l. A furnace wall, comprising a horizontally extending angle member, ahanger comprising a rail having a transversely sloping upper surface anda plurality of spaced arms, each of which has a substantially horizontalintermediate portion and a hooked terminal portion engaging a flange ofsaid angle member, insulating re brick provided with a recess of greaterdepth than the width of said rail and a slanting upper surface restingupon said rail, and blocks or slabs, of heat-insulating material of lowthermal conductivity adapted to rest upon and be bound between saidlbrick and said angle member by the weight of said brick sliding freelyand adjustably upon said slanting surface.

2. A furnace wall, comprising a horizontally extending angle member, ahanger comprising a rail having a transversely sloping upper surface andan arm having a substantially horizontal intermediate portion and ahooked portion normally engaging a flange of said angle member, aninsulating nre brick provided with a recess of greater depth than thewidth of said rail and a slanting upper surface resting upon said rail,said hanger arm having an upwardly extending lug, a block or slab ofheat-insulating material of low thermal conductivity resting upon thehorizontal portion of said hanger arm, and bound at its lower limitbetween said brick and said lug, and a second block or slab bound at itsupper portion between said -brick and said angle member.

3. In a furnace wall, the combination of an angle member and insulatingbrick provided with a recess having an inwardly and upwardly slopingupper wall, with a hanger comprising a rail portion having a slopingsurface in engagement with said recess wall, said rail portion having anarm comprising intermediate and hooked terminal portions, said hookedportion normally engaging the under side of a flange of said anglemember, while said intermediate portion engages the upper surface ofsaid flange, the intermediate portion of said arm being provided with alug. and a block or slab of heat-insulating material of low thermalconductivity supported by said intermediate portion and bound betweensaid brick and said lug, as said brick gravitates upon said sloping railsurface towards said angle member.

4. In a furnace wall, the combination of an angle member and insulatingbrick provided with a recess having 'an inwardly and upwardly slopingupper wall, with a hanger comprising a rail portion having a slopingsurface in engagement with said recess wall, said rail portion having anarm comprising intermediate and hooked terminal portions, saidintermediate portion being provided with a depending lug, said hookedportion normally engaging the under side of a flange of said member,while said intermediate portion indirectly rests upon the upper surfaceof said flange through the medium of said depending lug, saidintermediate portion also being provided with a second lug, and a blockor slab of heat-insulating material of low thermal conductivitysupported by said intermediate portion and bound between said brick andsaid lastmentioned lug, as said brick gravitates upon said sloping railsurface towards said angle member.

5. A furnace wall, comprising a supporting member, a hanger carriedthereby having an outwardly and downwardly sloping upper surface, a tirebrick having a recess provided with a surface of greater transverseextent than and resting upon the sloping surface of said hanger, andblocks or slabs of heat-insulating material bound in position by andoperating to prevent angular or transverse shifting of said brick, assaid brick is free to gravitate upon said hanger and press saidinsulating material against said supporting member.

6. In a furnace wall, the combination of an angle member, withinsulating brick provided with a recess having an inwardly and upwardlysloping upper wall, a hanger comprising a rail 5 of said angle memberIan upwardly extending lug carried by said hanger, the distance betweenthe inner surface of said hooked portion and the opposite face of saidlug being substantially equal to the transverse width of said flange,and in- 10 sulating slabs bound by and between said brick and lug andbetween said brick and said angle, as said brick gravitates freely uponsaid sloping rail surface.

WILLIAM H. BOYD.

